Suction mold



Nov. 11 192%, I 1,514,909

A. KADOW SUCTION MOLD Filed March 27, 1922 ill 1 IILNNH Patented Nov.11, 1924.

UNITED STATES- PATENT OFFICE.

AUGUST KADOW, F TOLEDO, OHIO, ASSIGN'OR TO THE LIIBBEY GLASSMANUFAC'IUR-ING COMPANY, OF TOLEDO, OHIO, A OORPORATION OF OHIO.

su'o'rIoN MOLD.

Application filed March 27, 1922. Serial No. 547,009.

will enable others skilled in the art to which 1t appertains to make anduse the same, reference being bad to the accompanying drawings, and tothe characters of reference marked thereon, which forma part of thisspecification.

This invention relates to the molding of articles from molten metal bysuction.

action, and particularly to a mold for such purpose.

. An object of the invention is the provision of a simple and eflicientmold for producing sections of bearing bushings and similar articles ina rapid and eflicient manner by the suction method whereby the suctionforce is so distributed with respect to the mold- I5 ing cavity as tocause a perfect and eflicient drawing of of the cavity. Further objectsand advantages of the invention will be apparent from 1 the followingdetailed description of the invention.

While the invention in its broader aspect is capable of embodiment innumerous forms, a. preferred embodiment thereof is illustrated in theaccompanying drawings,

as in which,

. Fig. 1 is a vertical longitudinal section of a mold embodying theinvention taken on the line 11 in Fig. 3. Fig. 2 is a cross- .section ofthe mold taken on the line 2-2 in 4 Fig. 1. Fig. 3 is a reduced top planview of the mold. Fig. 4 is an inner elevation of a sideplate of themold. Fig. 5 is a reduced pers ective view of the body member of the mol,and Fig. 6 is a reduced perspective view of the mold.

Referring to the drawings, 1 design-ates the body member-of the moldhaving, in the present instance, a semi-circular recess or depression 2in its top which extends throughout its width and is open both at thetop and sides of the member. A side-plate 3 is secured to the body 1 ateach side thereof in closed relation to the respective side of therecess 2, being secured thereto, in the i present instance, by screws 4.

the molten metal to all parts- A top plate or member 5 is mounted on thetop of the body member 1 inclose lapping relation at its side edges tothe top edges of the plates 3 and is secured to the body member byscrews 6 at each end. i The top plate 5 carries at its under side a coremember 7 fixedly attached thereto, in the present instance, by screws 8andprojecting down into the recess 2 of the body member 1 with its endsin close abutting relation to the respective side-plates 3. This coremember cooperates with the wall of the recess 2 and the side plates toform a molding cavity 9 of semi-circular form adapted to mold onehalf ofa ring, bushing bearing, or similar member, the upper ends of the cavitybein closed by the top plate 5. If the mold article is to have edgeflanges, as is usually the case with bearing bushings, the body member 1may be marginally recessed at the ends of the depression 2, as shown at10. An opening for the admission of molten metal to the core 9 isprovided through a hole 11, which extends from the central bottomportion of thecavity 9 down through the bottom of the body member 1 andhas its outer end enlarged and terminating in the present instance in abottom extension 12 on the body member.

The top plate 5 is provided in its to with a suction chamber or cavity13, whic has its top closed by a cover plate 14 that is secured closelyto the top of the plate 5 by screws 15 and also by the screws 6. Thechamber 13 has communication with a suction creating source througha-pipe 16 that is tapped into the plate 14.

The to of the bottom member 1 and bottom of 't e top plate 5 cooperateto form suction passages 17 at the outer sides of the upper ends of themolding cavity 9, and the top of the core 7 and bottom of the plate 5cooperate to form suction passages 18 at the inner sides of the upperends of the cavity 9. These passages extend throughout the width of thebody member 1 and core 7, in the present instance, by receming the topsof said members, and each is in communication with the upper end of thecavity 9 through thin relief passages 19 formed between the plate 5 andthe'respective members 1 and 7 as shown in Fig. 1. The size of eachouter relief pamage 19 is enlarged by providing a plurality of narrowslits 20 (Fig. 5) in the upper outer end walls of the nner portion, inorder to avoid chamber 13 through respective openings 21' and 22' in thetop plate 5.

In order to efi'ect a suction within the outer edges of the flangeforming recesses.

10 of the moldin cavity throughout the length thereof, eac side plate 3is provided in outwardly spaced relation to its recess with a recess 23,which parallels the recess 10 and cooperates with the respective side ofthe body member 1 to form a suction passage in communication at its endswith the passages 17 andhaving a thin relief space 24 extendingtherefrom to the outer edge of the recess 10 throughout its length. Aplunger 25 extends down through the top plates 14 and 5 and core 7 inregistering openings provided therethrough, with its inner end extendinginto the molding cavity 9 in register with and adapted to be projectedoutward through the inlet opening 11 of the cavity, the inner end of theplunger being of suitable size to fit such opening. Durin the drawing ofthe molten metal into the cavity 9 the inner end of the plunger 25preferably projects a short distance into the cavit and when asuflicient quantity of meta has been drawn into the molding cavity tofill the same and while such metal is form an opening through the centerof the molded article and to force from the inlet opening-11 the metaldisposed therein. If it is not desired to the molded articles theplunger may be rawn out-ward to inoperative position .or'

entirely eliminated. Where the plunger is not to be used, it ispreferable to have the outer end of opening 11 no larger than itsdifliculty in removing the casting.

In the use of my mold it is lowered into molten metal asuflicient'distance to submerge the inlet end of the opening 11 therein,and a vacuum being present in the chamber 13 will cause the metal toenter and completely fill the cavity 9 and associated flange formingrecesses 10, if-such recesses are provided, due to the uniformdistribution ends of the cavity and around the side edges thereofthrough the relief passages 19 and 24, in communication with thepassages 17, 18 and 23 which in turn are in communication with thevacuum chamber 13 through the openings 21 and 22. When asufiicientquantity of metal has been drawn into the tendency-to run back provideopenings through of 'the suction action across the upper molded articleand to eject the metal from the inlet opening 11. If the metal is ofsuch a consistency that it might have a out of the molding cavitythrough the inlet opening 11 after the mold has been raised from thebath and before the metal has been sufficiently cooled or congealed toretain its shape, then the plunger 25 may be employed as a valve orclosure member for the opening 11 to prevent such outward flowing actionof the metal from the cavity. The provision of such a valve isparticularly useful when molding lead, Babbitt metals and other metalsor alloys adapted to melt at relatively low temperatures, as in suchcases it is more difficult to cool the metal quickly enough afterremoval of the mold from the bath to prevent the metal or a portion ofthe same from flowing back out of the cavity, thereby forming imperfectcastings. When an article has been formed in the mold the top plates 5and 14 and core 7 are removed from the body of the mol'd'by a removal ofthe screws 6, after which the molded article may bewithdrawn from thebody recess 2. If the side plates 3 have a tendency to hold the moldedarticle in the recess 2 these plates may be removed from the body member-1 to permit an easy removal of the article.

I wish it understood that my invention is not limited to any specificconstruction, ar-.

rangement or form of the parts as it is capable of embodiment innumerous forms without departing from the spirit of the claims.

Having thus described my invention, what I claim as'new, and desire tosecure by Letters Patent, is,-

1. A mold of the class described, having a semi-annular moldingcavity'angular in cross section and as'sages in communica tion with thecavity entire] around the same at the external angles t ereof and .incommunication with a suction creating source.

2. A mold of the class described, having a molding cavity of.substantially semi-circular form with an inlet opening at its centralportion, suction passages at the inner and outer sides of the endportions of the cavity and around the side edges of the cavity with saidpassages in communication with a suction creating source.

3. A mold of the class described, having a molding cavity of arcuateform with an inletopening, a vacuum chamber in communicationwith asuction creating source, suction passages in communication with thevacuum chamber and with the molding cavity at its ends and around itssides.

'4. A mold of the class described; having a body portion forming acavity with an inlet opening thereto, means removabl secured to the bodyand cooperating wi its aof misses communication with 'asuction creatingsource, the body and means forming suction passages with the ends andsides of the molding cavity and with the vacuum chamber. I

5. A mold of the class described, comrisin a bod member havin a recessin its top and an inlet opening to the bottom of said recess, sidemembers secured to the body member and closing the opposite sides of therecess, a top means removably mounted on the body member and having acore part extending down 'into the recess and cooperating therewith toform an arcuate molding cavity, said means, body and side membersforming relief passages which communicate with the ends and sides of themolding cavity and with a suction creating source whereby molten metalis drawn intoand caused to fill all parts of the molding cavity by asuction action in the relief passages.

6. mold of the class described, forming a molding cavity of thinelongated form, an inlet opening into'the cavity midway of its lengthand suction passages in communication with the ends and sides of thecavity and adapted to have communication with a suction creating source,and a member movably carried by the mold and adapted to be projectedthrough a portion of the molding cavity and into the inlet opening inclosing communication therewith.

7. A mold of the class described, having a moldin cavity of arcuateformwith the .middle 0 the arc downward, an inlet opening into the lowestportion of thecavity,

suction passages connecting the ends of the arcuate cavity with a vacuumchamber, and a plunger movable vertically through the mold cavity andinto position to close the inlet opening.

8. A mold of the class described, having an inlet opening in its bottom,a molding cavity flaring upward and outward from the opening, andsuction passages connectinga vacuum chamber with the portion of thecavity most distant from the inlet, and a plunger movable through thecavity into closing relation with the inlet.

In testimony whereof I have hereunto signed my name to thisspecification.

AUGUST wow,

